Stopping mechanism for sewing-machines.



- No. 680,665. Patented Aug. I3, I90I.

D. NOBLE. STOPPING MECHANISM FOR SEWING MACHINES.

(Applica tion filed Aug. 16, 1900.)

2 Sheets-Sheet I.

(No Model.)

W ju eni'wt THE Ncnms PETERS cc, Pnmouma, WASHINGTON n. c.

No. 680,665. Patented Aug. l3, I90l.

- D. NOBLE. STOPPING MECHANISM FOR SEWING MACHINES.

(Application filed Aug. 16, 1900.

2 Sheets-Sheet 2.

'(No Model.)

UNITED I STATES ATEN'T Futon.

DONALD NOBLE, OF LONDON, ENGLAND, ASSIGNOR TO WHEELER & WILSONMANUFACTURING COMPANY, OF BRIDGEPORT, CONNECTICUT.

STOPPING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming att r Letters Patent No. 680,665, dated August 13,1901. Original application filed April 4, 1900, Serial No. 11,495.Divided and this application filed August 16, 1900. Serial No.

27,111. (No model.)

To ctZZruhom it may aorwern:

Be it known that I, DONALD NOBLE, a subject'of the Queen of GreatBritain, residing at Finsbury, London, England, have invented a certainnew and useful Improvementin Stopping Mechanisms for Sewing-Machines, ofwhich the following is a full, clear, and

exact description.

This invention relates especially to stop IO ping mechanism, or, asitisfamiliarlytermed,

a stop-motion for sewing-machines; andv the subject of this case isdivided out of my application for patent for eyelet-sewing machines,filed April 4, 1900, Serial No. 11,495,"

in accordance with the requirement of the Patent Office.

The inventioncomprises a stop-motion in be stopped. In connection withsuch a stopmotion Iemployan emergency stop by which the machine may bebrought toa'stop irrespective of the state of 'completion'of the 2 5cycle of movements, so that in case of break age of the thread or suchother difficulties, the operator may stop the stitching instantly, allas I will proceed now more particularly to set forth and finally claim.

In the accompanying drawings, illustrating my invention, in the severalfigures of which like parts are similarly designated, lligure 1 is afront elevation, partly in section, of parts of the well-known Wheeler&Wilson sewing- 3 5 machine equipped with my improvements.

Fig. 2 is a section taken in the plane of the line a ct of Fig. 1. Fig.3 is a side' elevation of the right-hand end of the sewing-machine. Fig.4 is a detail elevation of the brake-lever or emergency stop'used inconnection with the stop-motion and counting mechanism,

wherebythe movements of-the machine may be arrested,the'needle-vibrating mechanism being omitted.

The stop-motion device and the counting mechanism, herein in. part shownand which may be employed in this machine, form the subjects of PatentsNos. 656,852 and 656,853,

dated August 28, 1900, and therefore only such limited reference will bemade to these parts as is deemed necessary to a proper understanding ofmy present invention. Also the stitch-forming mechanism employed may beand so far as shown is of the usual construction found in the well-knownWheeler '& Wilson machine, having a horizontally-vibrating needle-bar,with the exception of the mechanism for imparting the horizontalvibration to the needle-bar.

. The bed-plate a, overhanging arm I), main 6o shaft 6, loop-taker d,needle-operating shaft 6, and the pitmen connecting the said two shaftsmay be of the usual Wheeler 8: Wilson construction. The needle-bar isarranged in vertical bearings in a vibrating gate, and has avertically-reciprocatin g motion imparted to it, all in any usual Way.The vibrating mechanism may be of any approved construction, but is hereshown as of the particular construction set forth in application SerialNo. 11,495, hereinbefore'referred to.

The clutch mechanism herein shown is the same as that shown in my PatentNo. 656,853, before referred to, and comprises the combined fly-wheeland hand-wheel f, having a friction-ring g, of leather, metal, or othersuitable material, applied thereto. his a movable clutch-disk arrangedwithin a recess within the fly-wheel and having headed bolts or rods t'applied'thereto, and these bolts or rods extend through thefriction-ring and through the clutch-disk j, also arranged within the.recess in the fly-wheel and having a sleeve is, which encircles theshaft 9 and upon which sleeve the fly-wheel turns freely, said sleevebeing rigidly secured to the shaft 6. Springs Z are interposed betweenthe heads of the bolts or rods and the clutch-disk j and normally tendto draw the clutch-disk it into contact withthefriction-ringg.Mountedloosely upon abearing m, projecting from the arm of the machine,is abrake-disk at, having a series of inclines on its left-hand face,which cooperate with similar inclines on the right-hand face of the disk0, which is likewise loosely mounted upon the bearing m, and this lastithe end of the horizontal shaft 9.

mentioned disk 0 has an arm 19, which is adjustably secured by the screwq to the arm of the machine. Interposed between the brake disk n and theclutch-diskj is a brake-ring a, seated in a recess in the clutch-diskj.In Fig. 1 this clutch mechanism is shown in the released position, whichposition is effected by a movement of the brake-disk it against theheads of the bolts or rods 2', which moves them toward the right, andthus releases the clutch-disk h from engagement with the friction-ringg, and subsequently the brake-disk '22 comes into contact with thebrake-ring r, and thus accomplishes the stopping of the needle-barshaft. Any other clutch mechanism having this capacity of motion may besubstituted for the clutch mechanism described.

The feed mechanism herein shown is the same as in my case, Serial No.11,495, referred to, and forms the subject of a divisional applicationthereof, filed July 14, 1900, Serial No. 23,639, and so far as showncomprises the rotary circular feed-disk 4, journaled within the plate 5.

7 is a bevel-gear which is secured concentrically to the under side ofthe feed-disk 4 and meshes with a beveled pinion 8, fast on The shaft 9is suitably journaled within the bed-plate, and tight on the other endthereof is a pinion 10, which meshes with a gear-wheel 11, secured upona horizontal counter-shaft 12, journaled within the base of the arm b.Upon the outer extremity of the counter-shaft 12 is secured a pinion 13,which meshes with and is driven by a large gear-Wheel 14, carried by thestopping-disk 15 of the counting mechanism. The stopping-disk 15receives an intermittent rotation through the clutch H,a segmentlever59, connected therewith, eccentric 55on end of shaft 0, and connection56 between said eccentric and segment-lever, as shown and described inmy Patent No. 656,852. Thus it will be clear that the circular disk 4receives its feed movements from the intermittent rotary movement of thestopping-disk 15 through an intermediate train of gearingto wit, gears7, S, 10, 11, 13, and 14, and shafts 9 and 12.

The feed-disk 4 has a central circular opening 1.6, within which extendsthe circular throat-plate 17, provided with the usual needle-aperture 18and a spur 19. The bevelgear 7, secured to the under side of thefeeddisk 4, has a central opening 20 to receive the circularthroat-plate. D The throat-plate 17 incloses the bevel-gear 7 and issupported in position bymeans ofscrews 21, (only one shown,) tapped intheunder side of the plate 5, Fig. 1.

22 is a cloth-clamp, secured to and supported in position by a circulartable or ring 23-, which is journaled around the feed-disk 4 in suchmanner as to be capable of turning or swinging freely around said disk.

24 is a washer interposed between: plate 5 and table 23 and disk 4. V 7

30 is a post whose upper end passes through a perforation 31 in theclamp 22, and pivoted ,to the upper end of said post is a cam-lever tothe usual brake-lever.

Referring to Figs. 2 and 4, is a spring held lever or dog pivoted to thelower end of the usual brake-lever 71 and adapted to cooperate with thestopping-disk 15 at the will of the operator. 72 is a shoulder or stopon the lever 71, whereby the downward movement of the inner end or nose73 of said lever is limited. The position shown in full lines in Fig. 4is that which these parts occupy when the machine has been stopped,while the dotted lines in this view illustrate the position'assumed bysaid parts when the machine is running. The effect of the lever 70 is topermit the brake-lever 71 to be operated manually at any time to stop orstart the machine irrespective of the relative position or time of thecounting-disk,- and this stopping is effected by throwing theemergency-lever 70 against disk 15, so as to project the upper end 75 ofsaid brake-lever within the field of travel of the cam 74. (Shown indotted lines in Fig. 2.) The reverse movement of the lever 70 takes theupper end 75 of the brake lever out of the field of travel of said cam74.

What I claim is- 1. A stopping mechanism for sewing-ma chines,comprising a stopping-disk, a brakelever, and an emergency lever or dogcarried by said brake-lever and interposed between said brake-lever andstopping-disk, whereby the machine may be brought to a stop irrespectiveof the state of completion of its cycle of movements, combined withmeans for forming stitches and means for controlling the number ofstitches to be made, substantially as described.

2. In an automatic stop-motion mechanism, the combination ofstitch-counting mechanism, a stop-motion mechanism including abrake-lever, and an emergency lever or dog carried by saidbrake-leverand interposed between said brake-lever and countingmechanism, whereby the machine may be brought to a stop irrespective ofthe completion of the full cycle of movements, substantially as setforth.

3. In an automatic stop-motion mechanism, the combination ofstitch-counting mechanism, a stopping-disk, a stop-motion mechanismincluding a brake-lever, and an emer- In testimony whereof I havehereunto set my hand this 15th day of August, A. D. 1900. 10

DONALD NOBLE.

Witnesses:

G. N. WORTHEN, NATHAN POOR.

